1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74755ee73f0cd74cc091beffa4c500d11161dedb665c623ca9dcbff46db1aed9. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e7e18c3-636c-4ea2-b32d-085ea751b9a0.json and https://artists.proofprofile.net/proofs/artist/6e7e18c3-636c-4ea2-b32d-085ea751b9a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f4f7278a600c5ddfa448485b6a44eba83a285730900cf4cd3b88e8268e1ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2223170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae59f24c22e42d7112891f74819651e99fd60f3d5159bba23e826f9194e843e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2223174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8983d08214af7cbbdcca591d05785c74da80d4443ec4d8e2ac499c88e6d1f3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82462084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c137bd1810301cbb1fbbddeaae516cdd54972aff7318cff4a8c15fef64d353. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82462085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eb7fff20321a7b4c30a1fc410810dce43a06eace6790e27bbf51e46bbc9f43. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82462086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca739dca63ff28348ff7400804ad87354f60827872354503ae44b5a02233abc9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:29:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82462087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada5b17d473a7034db8a22031056e4f58d007d1032cf11e0b9b64139ff8eb14. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82462088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7966532aa435f66426ade1d43df42d58fcd69fac6313a824cd812b51652b921. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2476400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdf887dec4e5df181278b2f47ca2dbcab8db042fa856e18fe28fcb2d18ed6e7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:28:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2522711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8057884285694a4090f97f27926adc1cbe7e8c636e41dcce408cfde2cd71acd5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42508117.